Shear-gage.



W. TESMER.

SHEAR GAGE.

APPLICATION FILED APR. 25, 1916- 1,189,310. Patented July 4,1916.

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SHEAR GAGE.

APPLICATION FILED APR. 25,1916 1,189,310. 1

Patented July 4, 1916.

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UNITED STATES PATENT .FFICE.

WILLIAM TESMER, 0F MIDDLETOWN, OHIO, ASSIGNOR TO THE AMERICAN ROLLING MILL COMPANY, OF NEWARK, NEW JERSEY.

SHEAR-GAGE.

Application filed April 25, 1916.

To all whom it may concern:

7 Be it known that I, W'ILLIAM TEsMEn, a citizen of the United States, residing at Middletown, Butler county, Ohio, have invented certain new and useful Improvements in Shear-Gages, of which the following is a specification.

This invention pertains to automatically acting gages for use in the shearing of tapering blanks from metal sheets or plates.

In shearing machines designed for this class of work it is usual to set the gage, which is disposed at the rear of the shearline, in such angular relationship to the shear-line that desired taper will be given to the blank sheared off, but before the next shearing stroke the sheet must be turned over in order that the next blank may have eral body of the sheet.

By means of my improvements I cause the gage to automatically reverse after each shear stroke, thus avoiding the necessity for turning the sheet over.

My invention will be readily understood from the following description taken in connection with the accompanying drawings in which Figure 1 is a rear elevation of the principal parts of a suitable shearing machine provided with myimprovements: Fig. 2 a vertical transverse section of the same in the plane of line a of Figs. 1, 5 and 6: Fig. 3 a vertical transverse section in the plane of line 0 of Figs. 1, 1, 5 and 6: Fig. 4: a plan of one of the gage-heads, and its immediate accessories, the supporting-bar appearing in horizontal section in the plane of line 7) of Figs. 2 and 3: Fig. 5 a plan of the gages and their supporting bar, portions of the supporting bar beingv in horizontal section in the plane of line b of Figs. 2 and 3; Fig. 6 a plan of the gages and their actuating gage-bar: Fig. 7 a rear elevation of the automatic mechanism for shifting the gage-bar, certain portions being broken away: Fig. 8 a side elevation of the same, a spring-stud appearing in vertical section in the plane of line (Z of Figs. 1, 5, 7 and 9: Fig. 9 a plan of the stationary hooking mechanism: Fig. 10 a plan of the oscillating hooking mechanism, parts appearing in the plane of line 6 of Figs. 7, 8 and 11:

Specification of Letters Patent.

Patented Jul 4, 191

Serial No. 93,486.

A diversity of scales is employed in the drawings. 7

In the drawings, giving special consideration for the present to Figs. 1 and 2: 1, indicates the vertically reciprocating gate of a shearing machine of the gate type: .2, the side housings in which the ends of the gate are guided; 3, the wrists carried by the gate to be engaged by the mechanism which reciprocates the gate: 4, the upper shear-blade carried by the gate: 5, the bridgetree disposed below and in front of the gate and rigidly connecting the housings: 6, the lower shear-blade, supported by the bridgetree, and adapted for cooperation with the upper shear-blade: and 7, the table supported in front of the lower shearblade and at substantially the level of its cutting surface. All of the parts thus far referred to may be as usual in shearing machines of the gate type and subject to usual appropriate modifications.

Continuing with the drawings :8, indicates a pair of brackets secured to and projecting rearwardly from the gate: 9, a bar, preferably in the form of an angle iron extending parallel with the shear-line and secured to brackets 8 and adjustable lengthwise of the brackets: 10, guides secured to bar 9 at some distance apart each side of the center of length of the gate, the axis'of these guides being at right angles to the gate:,l1, a gage-headsupported by each guide, between the guides and the gate and adapted to be engaged by a sheet slid rearwardly upon the table between the two shear-blades: and 12, a rearwardly project ing non-circular shank on each gage-head and engaging the appropriate one of the guides 10.

If, now, one of the gages be adjusted to position closer to the shear-line than the other gage and a sheet be passed between the shear-blades so as to have its rear edge in contact with the gages, a tapering blank will be sheared 01f. If the gages be now adjusted into position in transposition of their former relationship and a sheet have its rear edge adjusted into contact with them, another tapering blank may be sheared ofi but the taper of this second blank will be in a direction reverse to that of the first blank, and so on at each successive shearing stroke. Provision is made by means of which one of the gages is automatically advanced toward the shear-line and the other gage retracted before each shearing stroke.

Continuing with the drawings :13, inclicates a rearwardly projecting threaded stem on each of the gage-shanks: 14k, a rearwardly acting spring disposed on each of the stems and confined between the rear portion of the generzl guide-structure of the gage and an adjustable forwardly facing collar on the stem, these springs tending to urge the gages in a direction away from the shearing line: 15, a nut adjustable upon each stem and adapted to make contact with a forwardly presenting stop to adjustabl y limit the retreating motion of the gages: 16, a cam-bar disposed parallel with the gate and reciprocating in the general guide-- structures of the gages: 17, an oscillating arm journaled in a bracket carried by bar 9: 18, a link connecting arm 17 with cam-bar 16 and provided with a turnbuckle to serve in adjusting the length of the link: 19, adj ustable stops carried by the cam-bar to serve in limiting the length of the strokes of the cam-bar: and 20, angularly faced cams carried by the cam-bar and adapted to engage the rear portions of gage-shanks 12, the active portion of one of these cams facing toward one end of the machine while the active portion of the other cam faces toward the other end of the machine.

In one extreme position of the cam-bar, as brought about by the oscillation of arm 17, one of the cams will act on its appropriate gage and move and hold that gage to a position closer to the shear-line, this movement of the gage taking place against the resistance of the appropriate spring 14. At the same time the other cam will be moved to idle position out of active engagement with its gage, and the gage will take the retreated position as limited by its nut 15; It is thus seen that if the cam-bar be given one of its endwise positions before a given shearstroke, one of the gages will be moved and held toward the shear-line while the other gage is in retreated position, and it is also seen that if the cam-bar be properly moved endwise, before the next shearing stroke, the gage that was before advanced will go back to position of retreat, as determined by its nut 15, while the gage that was before in retreat will be advanced by its cam.

Mechanism is provided for shifting the cam-bar endwise, first in one direction and then in the other direction at each stroke of the gate, and this mechanism will now be described.

Proceeding with the drawings 21, indicates the bracket in which the shaft of arm 17 is journaled, this bracket being illustrated as being carried by the gage-supporting bar 9: 22, a fixedly secured vertical standard, this standard being illustrated, in the present case, as being secured to the floor: 23, a head fitted to slide vertically in a suitable guideway in the upper end of the standard: 24, a spring cooperating with the standard and. head and serving to hold the head in downward position: 25, a shaft journaled in bracket 21 and having the oscillating arm 17 secured to its rear end: 26, a substantially horizontal arm secured to the front end of this shaft, each end of this arm being provided with an upwardly open notch: 27, a pair of arms pivoted to and extending upwardly from head 23 at each end of arm 26: 28, an inwardly and downwardly projecting hook on the upper end of each of arms 27, these hooks being adapted to engage in the notches of arm 26; 29, cainarms pivoted to the head to the rear of hooks 28: 30, an inwardly presenting cam on the upper end of each of the cam-arms: 31, a lock-bar mounted to slide endwise on the face of notched arm 26 and, by endwise movement, close off one or the other of the notches in arm 26 so that only one of. the notches is adapted to be engaged. by a hook, the ends of this lock-bar being adapted, at proper times, to engage cams 30: 32, springs cooperating with head 23 and cam-arms 31 and serving to urge the upper ends of the arms inwardly: 33, spring connections between the upper ends of arms 27 and camarms 29, uniting those arms yieldingly as regards the movement of a cam-arm relative to its associate arm, in either direction: 3%, a spring tending to hold lock-bar 30 normally to neutral endwise position: 35, a substantially vertical block in the face of bracket 21. to the front of hook-arm 26, this block being formed by substantially vertical and horizontal grooves in the rear face of bracket 21: 36, a pin carried by lock-bar 31 and projecting forward through a suitable slot in the hook-bar and into the groove formed around block and 87, an adjustable spring friction clamp connected with standard 22 and the downwardly projecting shank of head 23 to furnish a resistance to the movement of the head with reference to the standard.

Giving consideration to Figs. 1, 5, 6 and 7, the shear-blades ai'e fully open; the cambar 16 is in its rightward position; the righthand gage is as far from the shear-line as its nut 15 will permit; the left-hand gage has been adjusted to a position closer to the shear-gage by the action of cam 20 pertaining to that gage; the righthand hook of the automatic mechanism is in engagement with the righthand notch of notched arm 26; the notched arm is in angular position with its righthand end lowermost; and the gages are in position for the shearing of a tapered blank having its narrow end to the left. The upper shear-blade now starts on its downward stroke to do the shearing; the notched arm moves downwardly. and disengages its notch from the right hand hook; spring 34 shifts the lock-bar to the right on the notched arm thus closing the right hand notch and opening the left hand notch; the left-hand end of the notched arm slides down past the lefthand hook, which yields to it; the cam on the left-hand cam-arm aids in the operation by forcing the lock-bar to the right if the spring has not completed the motion of the lock-bar and in forcing the left-hand hook far enough to the left to permit the downward passage of the lefthand end of the notched arm; the notched arm takes position below the hooks, with its right-hand notch closed and its left-hand notch open; the two gages are in unchanged position; and a tapering blank has been sheared from the sheet. The upper shearblade, having completed its downward stroke, moves upwardly; the left-hand notch of the notched arm engages the left-hand hook; the left-hand end of the notched arm becomes depressed and the cam-bar shifted to the left; the right-hand hook cannot engage its notch because the notch is closed by the lock-bar; the righthand hook is moved to the left by the cam on the righthand cam-arm; the upper shear-blade reaches the top of its stroke and is ready for a new cutting stroke; the right-hand gage has been shifted to a position nearer the shear line by the action of the righthand cam on the cam-bar; the left-hand gage has retreated from the shear-line to the distance permitted by its nut 15; everything is in condition for the shearing of the second blank with its taper the reverse of that of the previously sheared blank.

The two gages, considered as a single gage for employment in shearing a tapered blank, may be adjusted forwardly and rearwardly relative to the shear-line by adjusting the bar 9 on the brackets 8. The forward projection of a given gage is controlled by its cam 20 on the cam-bar, while its degree of retreat is adjusted by its nut 15, provision thus being made for variations in taper to be given the blanks. If there should be an accidental disordering of the automatic mechanism which would tend to destroy parts of it, the normally stationary head 23 which carries the hook mechanism may rise, against the resistance of spring 24, and prevent such accident, it being understood that head 23 and all of the parts carried by its upper end, constitute a stationary system.

It is of importance that the open notch of notched arm 26, which is to be engaged by a hook, be not prematurely closed. Such premature closing is prevented by the coaction of block 35 and pin 36. The lock-bar 30 can shift endwise, through any agency, only when the notched arm has completed oscillation so that the pin may shift from one side to the other of the block, and stops 19 permit of adjusting the limitations at the ends of the stroke of cam-bar 16. Even if it happens that, in the ascent of the gate, cam-bar 16 has reached its limit of motion, before the gate has completed its upstroke, spring 24 will yield and prevent the breaking of parts thus avoiding the necessity for so adjusting stops 19 that they will act coincidentally with the end of the upstroke of the gate.

I claim 2- 1. In a shear-gage, the combination with a stationary and a movable shear-blade, of i a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, and means for simultaneously moying one of the gages closer to and the other one farther from'the shear-line prior to each cutting stroke, substantially as set forth.

2. In a sheargage, the combination with a stationary and a movable shear-blade, of .a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, means for simultaneously moving one of the gages closer to and the other one farther from the shear-line prior to each cutting stroke, and means for adjusting the pair of gages together to and from the shear-line, substantially as set forth.

3. In a shear-gage, the combination with a stationary and a movable shear-blade, of

a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, springs connected with the gages and urging them in a direction away from the shear-line, adjustable stops to limit the retreating motion of the gages, and means for simultaneously moving one of the gages closer to and the other one farther from the shear-line prior to each cutting stroke, substantially as set forth.

4. In a shear-gage, the combination with a stationary and a movable shearblade, of a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, springs urging the gages away from the shear-line, ad-

justable stops to limit the retreat of the gages, an endwise movable cam-bar carried by said support, a cam carried by the cam-bar at each gage and serving to alternatively advance the gages away from their stops, and means for shifting the cam-bar endwise prior to each cutting stroke, substantially as set forth.

5. In a shear-gage, the combination with a stationary and a movable shear-blade, of pair of gages disposed at the rear of the blades and movable to and from the shear line, a support for the gages, springs urg-" the gages away from the shear-line, justable stopsto limit the retreat of the gages, an endwise movable cam-bar carried by said support, a cam carried by the cambar at each and serving to alternatively advance the gages away from their stops, means for shifting the cam-bar endwise prior to each cutting stroke, and adjustable stops for limiting the endwise movement of the cam-bar, substantially as set forth.

6. In a shear-gage, the combination with a stationary and a movable shear-blade, of a gage-supporting bar at the rear of the shear-blades, a plurality of guides carried by said bar, a gage fitted to slide in each guide toward and away from the shear-line, springs connected with the gages and urg ing them away from the shear-line, adjustable stops to limit the retreating motion of the gages, and means for simultaneously moving one of the gages closer to and the other one farther from the shear-line prior to each cutting stroke, substantially as set forth.

7. In a shear-gage, the combination with a stationary and a movable shear-blade, of a gage-supporting bar at the rear of the shear-blades, a plurality of guides carried by said bar, a gage fitted to slide in each guide toward and away from the shear-line, springs connected with the gages and. urgthem away from the shear-line, adjustable stops to limit the retreating motion of the gages, means for simultaneously moving one of the gages closer to and the other no farther from the shear-line prior to each cutting stroke, and means for adjusting said gage-supporting bar and the gages carried by it to and from the shear-line, substantially as set forth.

8. In a shear-gage, the combination with a stationary and a movable shear-blade, of-

a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, and mechanism connected with the movable shearblade and serving to automatically move one of the gages closer to and the other one farther from the shear-line as the movable shear-blade rises, substantially as set forth.

9. In a shear-gage, the combination with a stationary and a movable shear-blade, and a vertically reciprocable gate carrying the movable shear-blade, of a gage-support carried at the rear of the gate and moving with it, a pair of gages mounted for movementin the gage-support to and from the shear-line, and means for simultaneously moving one of the gages closer to and the other one farther from the shear-line as the gages rise with the gate, substantially as set forth.

10. In a shear-gage, the combination with a stationary and a movable shear-blade, of a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, springs urging the gages away from the shear-line, adjustable stops to limit the retreat of the gages, an endwise movable cam-bar carried by said support, a cam carried by the cam-bar at each gage and serving to alternately advance the gages away from their stops, an oscillating arm, a connection between said arm and the cam-bar, an arm fast with the oscillating-arm and provided with a notch near each of its ends, a pair of hooks adapted to engage said notches, a lock-bar mounted for sliding motion on the notched arm and adapted to close one or the other of said notches, means for causing relative movement of the notched arm and hooks so that the notched arm may be vibrated at each rise of the movable shear-blade, and mechanism for shifting the lock-bar cndwise after each cutting stroke, substantially as set forth.

11. In a shear-gage, the combination with a stationary and a, movable shear-blade, of a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, springs urging the gages away from the shear-line, ad

justable stops to limit the retreat of the gages, an endwise movable cam-bar carried by said support, a cam carried by the cambar at each gage and serving to alternatively advance the gages away from their stops, an oscillating arm, a connection between said arm and the cam-bar, an arm fast with the oscillating-arm and provided with a notch near each of its ends, a pair of hooks adapted to engage said notches, a lock-bar mounted for sliding motion on the notche-c arm and adapted to close one or the other of said notches, means for causing relative movement of the notched arm and hooks so that the notched arm may be vibrated at each rise of the movable shear-blade, mechanism for shifting the lock-bar endwise after each cutting stroke, and a yielding device connected with the hooks to compensate for excess strain on the notched arm, substantially as set forth.

12. In a shear-gage, the combination with a stationary and a movable shear-blade, of a pair of gages disposed at the rear of the blades and movable to and from the shearline, a support for the gages, springs urging the gages away from the shear-line, adjustable stops to limit the retreat of the gages, an endwise movable cam-bar carried by said support, a cam carried by the cam-bar at each gage and serving to alternatively advance the gages away from their stops, an oscillating arm connected with the cam-bar,

an arm fast with the oscilllating arm and having a notch near each of its ends, a lockbar sliding lengthwise of the notched-arm and adapted to close one or the other of the notches, a pair of pivoted hooks adapted to engage the notches in the notched arm, means for causing relative movement of the notched arm and hooks so that the notched arm may be vibrated at each rise of the movable shear-blade, and cams yieldingly connected with the hooks and adapted to engage ends of the lock-bar and shift it enclwise and shift an idle hook away from the notched bar, substantially as set forth.

13. A shear-gage comprising in its mech nism, an oscillating arm having a notch near each of its ends, a lockbar mounted to slide endwise on the notched arm and close one or the other of the notches, a pair of hooks adapted to engage said notches, cams yieldingly carried by the hooks to serve in moving an idle hook away from the notched arm, and means for giving relative movement to the pair of hooks and the oscillating arm and for shifting the locking bar in alternately opposite directions, whereby the notched arm is oscillated first in one and then in the other direction, combined substantially as set forth.

14. In a shear-gage, the combination with a stationary and a movable shear-blade and a gate carrying the movable shear-blade, of

support and having a notch near each of its ends, a lock-bar mounted to slide on the os cillating-arm and close its notches alternately, means for shifting the lock-bar endwise in one direction after one cutting stroke and in the other direction after the next cutting stroke, and a pair of hooks fixedly supported with reference to the oscillating arm and adapted to engage its notches substantially as set forth.

15. In a shear-gage, the combination with a stationary and a movable shear-blade and a gate carrying the movable shear-blade, of a gage-supporting bar carried by the gate at its rear, a pair of gages carried by the supporting-bar and movable to and from the shear-line, an oscillating arm carried by said support and having a notch near each of its ends, a lock-bar mounted to slide on the oscillating-arm and close its notches alternately, means or shifting the lock-bar endwise in one direction after one cutting stroke and in the other direction after the next cutting stroke, a pair of hooks fixedly supported with reference to the oscillating arm and adapted to engage its notches, and a yielding connection between the hooks and their fixed support to permit the yielding of a hook after its work is done, substantially as set forth.

WILLIAM TESMER. Witnesses:

J .R. FREEZE, R. B. CARNAHAN, Jr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner at Patenta, Washington. D. C. 

